Mechanism for effecting reverse plating



May 19, 1931. J. LAWSON ETAL 1,306,299

MECHANISM FOR EEFECTING REVERSE PLATING Original Filed March 5, 1927 2Sheets-Sheet l 8 [729.1. A? /2 I l4 lnveni/ora JbFwnL aws on,BOZBWZ'HZJaIl/SOW May 19, 1931. J. LAWSON ET AL 1,806,299

MECHANISM FOR EFFECTING REVERSE PLATING Original Filed March 3, 1927 2Sheets-Sheet 2 Invnib s John/Lawson, zez iflfllawson,

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Patented May 19,1931

UNITED STATES PATENT OFFICE JOHN LAWSON ROBERT E. LAYVSON, OFIPAWT'UCKET, RHODE ISLAND, ASSIGNORS TO HEMPHILL COMPANY, OF CENTRALFALLS, RHODE ISLAND, A CORPORATION OF MASSACHUSETTS MECHANISM FOREFFECTING REVERSE PLATING Original application filed March 3, 1927,Serial No. 172,331. Divided and this application filed January 8, 1929.Serial No. 330,999.

This application is a division of our copending application Serial No.172,331, filed March 3, 1927.

This invention relates to mechanism for effecting reverse plating by ormainly by the action of casting off or like mechanism.

In order that the principle of the invention may be readily understood,we have disclosed one embodiment of the mechanism and instrumentalitieswhereby the invention may be practised.

In the drawings: 7

Fig. 1 is a plan view of the sinker or web holder ring and showing inhorizontal section the cams of the sinker cam ring, the top plate ofsaid ring beingremoved, the parts being positionedfor effecting reverseplating;

Fig. 2 is a similar view but with the parts positioned for normalplating;

Fig. 3 represents in side elevation seven different positions of aspecial web holder or sinker used in effecting reverse plating, and alsorepresents the companion regular web holder in the same groove andalsothe adjacent needle for effecting reverse plating; and

Fig. 4 represents a needle and the yarns or threads in several positionsin effecting reverse plating by the use of the instrumentalities shownin Fig. 3.

In the United States patent to Robert H. Lawson, No. 1,605,895, datedNovember 2, 1926, Reissue No. 16,589, dated April 5, 1927,

there are disclosed means for effecting reverse plating by the action ofcasting off mechanism, whereby lengthwise extending stripes may beformed in hosiery or other knitted fabrics. In the United States Patentto Robert H. Lawson, N 0. 1,605,896, dated November 2, 1926, there isdisclosed means for effecting reverse plating through the action ofcasting off mechanism the transverse movements thereof are selectivelygoverned, whereby a great variety of patterns may be provided.

In the present application means are disclosed constituting improvementson the mechanism shown in both of said patents. The mechanism shown inFigs. 1 and 2 hereof is particularly adapted for use in connection withany form of means selectively governing the transverse movements of thecasting off mechanism or of the instrumentalities moving transversely ofthe needles in effecting reverse plating.

Referring first to that form of mechanism shown in Figs. 1 and 2, itisto be understood that the same is preferably used with means selectivelygoverning the transverse movements of the special instrumentalities,such means being preferably one or more disks of the general types shownat 44 and 45 in the said patent to Lawson, No. 1,506,896. It is deemedunnecessary to illustrate herein such disks and their operating means,but reference is made to that patent for a full disclosure of said disksand their manner of operation in selectively positioning the specialinstrumentalities for movement transversely of the needles.

Referring more particularly to Figs. 1 and 2, the web holder bed ring isindicated at 1, it having radial or transversely extending grooves 2 forreceiving the regular web holders indicated at 60 in Fig. 3, and alsofor receiving the special instrumentalities indicated at 54 in saidfigures. The sinker cam ring, the top plate whereof has been removedfrom Figs. 1 and 2, is provided with a series of cams providingdifferent pathways, in the inner one of which the regular web holdersand in the two outer ones of which the special instrumentalities areguided, depending upon whether normal or reverse plating is beingeffected. The cam constructions shown in Figs. 1 and 2 are identical, itbeing understood that in Fig. 1 are shown or indicated the position andmovements of the regular web holders and special instrumentalities ineffecting reverse plating, whereas in Fig. 2 are shown or indicated thepositions and movements of the parts in effecting normal plating.

As shown in Figs. 1 and 2, we provide an outer cam 5 of generalsegmental form and extending from the vertically movable, inclined cam6, which is similar to and is operated in the same manner as the camedge 72 of the patent to Lawson No. 1,605,896.

shownat 8 and 9m Figs. land 2. Radially fcircumferentially beyondthe'pomt where the specialinstrumentahtics are so moved The purpose of thesaid cam 6 is to move all the special instrumentalitiesinto the outerpathway. f

. Radially within the segmental cam is a somewhat similar cam 7sufiiciently spaced from the cam '5 to provide a pathway wherein may bereceived the butts ofthe' special in strumentalities in effectingreverse plating.

' regular shown Radially inside the cam? is provided azpath- Way whereinat all-times the butts of the regular web holders or sinkers 60 ride, itbeing understood that the special instrumentalities 54 are of greaterlength than the sinkers orweb holders 60, as clearly in'Figs. 3' and 4;When the cam 6 is elevated, the special inst'rumentalities' may rideinto the'path'wayv between the cams 5 and.

'17." The cam ,7 may extend in substantially annular form entirely aboutthe circle of needles excepting for the separate cams outside of theseparate cam 9 is a cam 10 'be'tweenwhich and'the cam 9 the butts of thespecialinstrumentalities ride; The cam 7 at the end thereof nearest thecam 8 -is shaped as indicated at '11 to ellect rad ally outward novementof the regular web holdersp I The purpose ofthis action is substantially'y ondwhich the- The segmental cam 5 is provided with an inwardlyslopingor inw ardlyfextending end part 12, the purpose of which is tomove the special instrumentalitiesradially inward at an earlierpointclrcumferentially eons1dered,"or,1n other words, at an earlierPC1115 in the stitch forming operation, than the'regularweb holders aremoved inward at or near the casting off point.

thatdescribed in said LawsonPatent No. 1,605,895, now Reissue No.16,584. Slightly inward, that is, to-the left thereof viewing Fig; '1,the inner edge of the cam 9 is sloped inward as indicated. at 13,such-gslope tQIIIII vnating in thep'oint' 1e, circumferentially beedgeof the cam 9 slopes again outwardly, as indicated at 15 The purpose ofthe slope 13 up to the point it is to force the regular web holdersinwardly in the regular stitch orm1ngoperat1on.

Assuming that the inclined cani 6has been elevated, the disks or otherselective rnechan1sm,'one type whereof is shown in the saidLawson-Patent No;f1,605,896, move into the outside-oi the cam 5. In theusually thin.

Whose butts 17 ride in the inner pathway radially inside of the cam 7,are also projected inward. Y

i The result is to effect=reversegplating by reason of such inward ortransverse movement of the special instrumentalities 54.

In Fig." 3 is shown at'54 a special instrumentality which isintendedto-be'used with that generalform of cam' arrangement referredto, but with a regular sinker or web "holder '60 in the same groovetherewith, so

that in employing this fornrof our invention wider grooves than thoseshown' 'are necessary unless the specialinstrumentalitiesand :regul'arweb holders are nade un- The special instrumentality 54:15 provided withan upper nib 56, the front edge 57 whereof-slopes upward and backwardfrom the lower pointor roundedcorner 58, below which the said specialinstrumentality is cut away as indicated at 59. To provide means tosupport the .yarn orthread in the loop drawing operation, a regular webholder or sinker 60 is provided, the notchfil'whereof affordsby itslower edge ashoulder over which the loop may be drawn. NVe haverepresented the two yarns atv 50 and .51, and

itfwill' be understood that the tension and feeding conditionsarexlesirably the same as described with respect to the correspondingyarns in said Reissue Patent No. 16,584. In the inward movement of thespecial instrumentality 54 in vthedo'wnward movement of the needle 52,the upper yarn 50 is pressed or moved inward/by the inclined edge; 57, Yand the lower or white yarn ,51: enters into the notch 61 of theregularweb holder so that the two yarns are separated and reverse plating results in a manner similar to that shown in Fig. 3.

We have notherein represented the cam means outside the sinker cam ringfor moving special instrumentalities transversely of the needles inefiecting reverse plating, but it is tobe understood that. said cammeans maybe those shown in the parent application hereoflit beingunnecessary to illustrate the same in this application, which is moreparticularly directed to the instrumentalities which are operated uponby the cam and other mechanism. 5 2

The number of special cams employed may :be variedas desired, andif-buta single spe cial cam movinginthe same horizontal plane beemployed, all thebuttsof the special instrumentalities ar-e'of the samelength. If,

however, two or more such. special cams are employed, or i-fthesingle-specialcam itself be selected through being caused to operate intwo or more horizontal planes by" pattern means, the butts of thespecial instrumentalities will contrast among themselves according tothenumber of .thesaidspecial cams or according to the horizontal planes ofoperation of such single special cams. For example, if there be twospecial cams one overlying the other, the lower of said special camswill act upon the lower butts and the overlying special cam will actupon the longer butts. The provision of contrasting butt lengths isdisclosed in the Lawson patent, Reissue No. 16,584.

Having thus described one illustrative embodiment of the invention, itis to be understood that although specific terms are employed, they areused ina generic and descriptive senseand not for purposes oflimitation, the scope of the invention being set forth in the followingclaims.

Claims 1. Mechanism for effecting plating and reverse plating in aknitted fabric including a series of independent needles, threadengaging instrumentalities for each needle respectively and includingspecial instrumentalities where reverse plating is to be formed, saidinstrumentalities being movable individually transversely of the needleseries, each of said special instrumentalities having an upper nibsloping upwardly and backwardly from its lower edge, said sloping edgebeing adapted to effect thread engagement in re verse plating during theloop forming operation each said instrumentality directly below theupper nib having a front edge which extends from the most outwardportion of the lower edge of the nib at a downward, inward slope untilit merges with the base portion of the instrumentality.

2. Mechanism for effecting platin and re verse plating in a knittedfabric including a series of independent needles, a series of regularweb holders and a series of special instrumentalities, there being aregular web holder and special instrumentality between each two needlesand movable individually transversely of the needles, each specialinstrumentality having a nib whose lower, substantially horizontal edgeis positioned in action slightly above the adjacent edge of thecompanion web holder to permit entry of both threads between said edges,the forward edge of said special instrumentality above said horizontaledge sloping upwardly and backwardly and adapted during reverse platingto eifect thread engagement, and the forward edge of said specialinstrumentality directly below the upper nib extending from the mostoutward portion of the lower edge of the nib at a downward inward slopetomeet the base portion of the said special instruinentality.

3. Mechanism for effecting plating and reverse plating in a knittedfabric including a series of independent needles, a series of regularweb holders and a series of special instrumentalities, there being aregular web holder and special instrumentalities between each twoneedles and movable individually transversely of the needles, eachspecial instrumentality having a nib whose lower, substantiallyhorizontal edge ispositioned in action slightly above the adjacent edgeof the companion web holder to permit entry of both threads between saidedges, the forward edge of said special instrumentality above saidhorizontal edge sloping upwardly and backwardly and adapted durlngreverse plating to effect thread engagement, and means governing thetransverse movement of said regular web holders and specialinstrumentalities to cause the latter to act at an earlier point thanthe regular web holders in reverse plating.

4. In mechanism for eifecting plating and reverse plating uponindependent knitting needles and in which two threads are introduced ina plating relation, one or more special thread engaginginstrumentalities movable transversely to the needle series, each havingan upper nib sloping upwardly and backwardly from its lower edge, saidsloping edge being adapted to effect thread engagement in reverseplating during the loop formation each said instrumentality directlybelow the upper nib having a front edge which extends from the mostoutward portion of the lower edge of the nib at a downward, inward slopeuntil it merges with the base portion of the instrumentality.

5. In mechanism for effecting plating and reverse plating uponindependent knitting needles and in which two threads are introduced ina plating relation, one or more special thread engaginginstrumentalities movable transversely to the needle series, each havinga nib whose lower, substantially horizontal edge is adapted to bepositioned in action slightly above the adjacent edge of a companion webholder, so as to permit entry of both threads between said edges, theforward edge of such special instrumentality above said horizontal edgesloping upwardly and backwardly and adapted during reverse plating toeffect thread engagement, each said instrumentality directly below theupper nib having a front edge which extends from the most outwardportion of the lower edge of the nib at a downward, inward slope untilit merges with the base portion of the instrumentality.

In testimony whereof, we have signed our names to this specification.

JOHN LAWVSON. ROBERT H. LAWSON.

